Clamping-wrench.



A. H. BASTIAN.

CLAMPING WRENCH.

APPLICATION FILED FEB.19, 1915.

Patented Jan. 25, 1916.

INVENTOR A H. Bast/an,

A TTOR/VEY AUGUST H. BASTIAN, 0F HILLSDALE, OREGON.

CLAMPING-WRENCH.

Specification of Letters Patent.

Patented Jan. 25, 19116.

Application filed February 19, 1915. Serial No. 9,437.

vide a tool of this character which may be quickly adjusted to theobject to which it is applied, and to make the means which I use forsuch purpose of a" simple and durable construction.

My invention furthermore has for its particular purpose to improve themeans actuating the movable jaw so that the, power may be mosteffectively applied, and that the strain incidental to the applicationof the power will be properly taken care of, and will not tend to imposeany undue strain.

In order to further explain my invention, it is required to illustrateand describe the details of its construction and mode of operation,which are shown in the accompanying drawings, constituting a part ofthis specification.

In such drawings, Figure 1 is a sectional side elevation with the partsbroken away, and shows my invention as applied to a monkey wrench. Fig.2 is a side elevation showing my device applied to an end wrench. Fig. 3is, a vertical section taken on the line 33 of Fig. 2. Fig. 4 is ahorizontal section taken on the line 44 of Fig. 2. Fig. 5 is alarger-scale sectional detail illustrating the location and cooperationof the elements through which the power is applied to the movable jaw. Fig. 6 is a crosssection onthe line 6-6 of Fig. 2. Figs. 7 and 8 showrespectively a side elevation and an end elevation of what I term thepivotblock of my invention, being one of the elements through whichthepower is applied to the movable jaw, and Fig. 9 is a detail ofconstruction relating to the wrench shown in Fig. 1.

For convenience, I will describe the construction of the type of wrenchshown in Fig. 2 first, since the sectional details shown relate thereto.This wrench comprises a primary member, consisting of a shank a, on, oneextremity of which is formed a wrench-head I), made with an integral jawc. The wrench-head has a longitudinal cavity (Z, in which slides theshank e of the movable jaw f. The wrench-head further has a portion cutout as at g. In this cut out portion is located the screw it, pinned bya pin it on a shaft 21 and said screw engages with the teeth j, providedon the inner surface of the shank e, of the jaw 7. One extremity of theshaft z', bears in a journal hole It, therefor provided in thewrenchhead 6. On the opposite end of the shaft z is mounted apivot-block m, of which a side elevation is shown in Fig. 7 and an endelevation in Fig. 8. From the latter figures it will be observed thatthe pivot-block m, is made with a longitudinal hole Z, for receiving theshaft 71, and that the axis of the latter approximately intersects theaxis of the trunnions n, projecting laterally from the pivot block m. 0is a lever one end, p, ofwhich is bifurcated and pivoted on a pin 9, tothe wrench-head b of the primary member a. The extremities of theperforated bifurcated portion 72 of the lever 0 are made with holes inwhich are journaled the trunnions n of the pivot-block m. The pivot g,of the lever o is located close to the trunnions n, of the pivot-block;see Fig. 5. By reason of this fact and that the axis of the longitudinalhole Z of the pivotblock m, and the trunnions n, intersect as described,the lever o is given great power for applying clamping pressure to themovable jaw f; and, furthermore, no detrimental stress is imposed uponthe pivot-block in the operation of applying such clamping pressure. 7

m is a washer.

For the purpose of locking the movable jaw f, in its clamping position,I provide means for locking the free ends of the shank a and the lever0, together. These means will be more readily understood by comparingFigs. 1 and 2. The construction and operation of said means will bedescribed in connection with the application of my invention to the typeof wrench shown in Fig. 1. Such wrench consists of a shank 1, made withan integral jaw s. ()n the shank 1, slides the movable jaw t, in whichis threaded a screw u, made with a milled head 1/ and a reducedextension u. See Fig. 9.

, pivot-pin :22.

The latter is inserted in a pivot-block Q), of similar construction andpurpose as the pivot-block m. lhe latter has laterally projectingtrunnions t" which are journaled in the forked end w of the lever '10.Such forked end is pivoted to the shank 1' by a The lever w is made withlateral flanges 3 and pins 2, e, on which is fastened a spring 2. oneextremity of which bears in a hole 3, therefor provided in the shank rof the primary member. The outer end of the lever 1c is made with a head4 in which is reciprocably contained a lock ing-bolt 5, having a shank 6provided with a perforation in which is secured one bent end of the rod7, the opposite end of which is also bent and projects through a slot 8of the lever '10, and has a head 9 and a latchplate 10 secured to it.The free end of the latch-plate 10 is understood to be made with aperforation, so that by lifting the same it may be locked with a stud11, for holding the locking-bolt 5 in its retractedposition; thelocking-bolt being normally "projected by the spring 12. The outer orfree end of the shank 1' of the primary member is made with aperpendicularly projecting lockinghead 13, having on its inner face aseries of notches 14, formed like serrations, adapted to be engaged withthe locking-bolt 5. The outer end of the lever w is formed preferablywith a socket 15, in which to receive the locking-head 13. The outerends of the shank of the primary member and the lever of my wrench maybe locked together by said locking means when the wrench is not to beused, and when so locked together, the cavity 16 will be convenient forhanging up the wrench, on a peg in a tool-case or on the wall. Asevident, my wrench may also be used like a common wrench, for unscrewinga nut,'for example, in which case the lever 0 (or 'w') is locked to theshank of the primary member, and the movable jaw 7, (or t) is then setagainst the fixed jaw as desired, by'manipulating the screw it (or u).

I claim- 1. In a device of the character described, the combination of aprimary member consisting of a shank made with a head provided with afixed jaw; a cooperating jaw reciprocably supported by said head of saidprimary member; means for moving the reciprocable jaw toward and fromsaid fixed jaw, a shaft included in such means, such shaft havingreciprocable movement in the head of said primary member; a pivotblockcarried by said reciprocating shaft, such block made with trunnions, alever pivoted at its upper end to the shank of said primary member, thepivot being located close to the trunnions of said pivot-block, and thetrunnions of the latter being journaled in said upper end of the lever.

2. In a device'of the character described,

the combination of a primary member consisting of a shank made with ahead pro said primary member, the pivot being -lo-,

cated close to the trunnions of said pivotblock, and the trunnions ofthe latter being journaled in said upper end of the lever; means carriedby the free end of the shank on said primary member and said lever forlocking the latter against retractive movement.

3. In a device of the character described, the combination of a primarymember consisting of a shank made with a head provided with a fixed jaw;a cooperating jaw reciprocably supported by said head of said primarymember; a shaft reciprocable in said head of the primary member; arotatable screw carried by said shaft and operating to reciprocate saidmovable jaw; a pivot-block made with lateral trunnions and alongitudinal hole, the longitudinal axis of the latter intersectingapproximately the axis of said trunnions, such pivot-block beingslidably mounted on said shaft; a lever pivoted at its upper end to theshank of said primary member, the pivot being located close to thetrunnions of said pivotblock, and the trunnions of the latter beingjournaled in said upper end of'the lever.

4. In a device of the character described, the combination of a primarymember consisting of a shank made with a head provided with a fixed jaw;a coiiperating jaw.

reciprocably supported by said head of said primary member; a shaftreciprocable in said head of the primary member, a rotatable screwcarried by said shaft and operating to reciprocate said movable jaw, apivot-block made with lateral trunnions and a longitudinal hole, thelongitudinal axis of the latter intersecting approximately the axis ofsaid trunnions, a lever pivoted at its upper end to the shank of saidprimary member, the pivot being located close to the trunnions of saidpivot-block, and the trunnions of the latter being'journaled in saidupper end of the lever; means carried by the free ends of the shank ofsaid primary member and said ;lever for locking the latter againstretractive movement.

5. In a device of the character described, the combination of a primarymember consisting of a shank made with a head pro vided with a fixedjaw; a coiiperating jaw reciprocably supported by said head of saidprimary member; a shaft reciprocable in said head of the primary member,a rotatable screw carried by said shaft and operating to reciprocatesaid movable jaw, a pivot-block carried by said reciprocating shaft,such block made With trunnions, a lever pivoted at its upper end to theshank of said primary member, the pivot being" ivided with a fixed jaw;a cooperating jaw reciprocably supported by said head of said primarymember; a shaft reciprocable in said head of the primary member, arotatable screw carried by said shaft and operating to reciprocate saidmovable jaw, a pivot-block carried by said reciprocating shaft, suchblock made with trunnions, a lever having its extremitiesoperativelyconnected with said reciprocable shaft and being fulcrumed in closeproximity to such point of connection; means carried by the free ends ofthe shank of said primary member and said lever for locking the latteragainst retractive movement.

AUGUST H. BASTIAN.

